CN1207684C - Video frequency electronystagmograph instrument and automatic generation of video frequency electronystagmograph - Google Patents
Video frequency electronystagmograph instrument and automatic generation of video frequency electronystagmograph Download PDFInfo
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- CN1207684C CN1207684C CNB031375839A CN03137583A CN1207684C CN 1207684 C CN1207684 C CN 1207684C CN B031375839 A CNB031375839 A CN B031375839A CN 03137583 A CN03137583 A CN 03137583A CN 1207684 C CN1207684 C CN 1207684C
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Abstract
The present invention provides a video electronystagmograph which is capable of directly collecting nystagmus movement images under the condition of bright field or dark field and is capable of carrying out the real-time examination of nystagmus so as to record and analyze physiological parameters of the nystagmus in a level direction, a vertical direction and a rotation direction in real time. The present invention comprises an infrared video nystagmus image collecting device, an eye movement tracking system, a computer analyzing and processing system and a nystagmus monitor, wherein video signals of the infrared video nystagmus image collecting device are transmitted to the eye movement tracking system; the eye movement tracking system forms an electric connection with the computer analyzing and processing system; video signals of the computer analyzing and processing system are transmitted to the nystagmus monitor. The present invention also provides an automatic generation method of a video electronystagmograph, wherein the method can be used for recording and analyzing physiological parameters of the nystagmus in a level direction, a vertical direction and a rotation direction in real time so as to effectively shorten clinical testing time.
Description
Technical field
The present invention relates to auricularis section and vestibular function examination medical equipment field, the automatic generation method of particularly a kind of video frequency electronystagmograph instrument and video frequency electronystagmograph.
Background technology
(Electronystagmograph is a kind of conventional project that detects nystagmus at present clinically ENG) to electronystagmograph, is widely used in hals,Nasen und Ohrenheilkunde, Neurology and ophthalmology.Electronystagmograph is the same with the record of other biological electricity (cardiogram, electroencephalogram, electromyogram etc.), is the important means of clinical disease diagnosis and curative effect assessment.The doctor can judge the functional status and the pathologic process of human body vestibular (Vestibular) equilibrium function system and eye movement system more exactly by the inspection analysis of electronystagmograph, also can the auxiliary positioning diagnosis.
In the prior art, the record of electronystagmograph is to observe the eye movement displacement parameter indirectly by the faint cornea of epidermis electrode guiding, retina potential difference (PD), one of defective that it is intrinsic is that signal to noise ratio (S/N ratio) is close, useful signal is covered by the electromyographic signal of same frequency range, therefore gathering electronystagmograph needs complicated and high-precision signal to amplify and regulating circuit, and clinical result of use is also undesirable; Its two because the influence of the polarized potential of skin electrode, the baseline wander of nystagmus ripple makes useful signal be difficult to identification; Its three, the influence of cornea, the many internal and external factors of retina potential difference (PD) audient as waking state, nethike embrane blood supply and indoor light and shade etc., makes nystagmus ripple calibration complicated unusually, difficult, the signal reliability of its collection is also influenced; Its four, electronystagmograph can not be observed this important clinical index of nystagmus rotation composition; Its five, electronystagmograph is recorded in can not provide the doctor to see in real time the chance of looking into nystagmus under the dark room conditions.In a word, existing electronystagmograph recording method complicated operation, waste time and energy and validity not enough.
Summary of the invention
The present invention is directed to the defective that exists in the prior art, provide a kind of movements,nystagmic image and can seeing in real time under bright-field or dark field condition, can both directly gathered to look into, so that real time record and analyze the video frequency electronystagmograph instrument of nystagmus in level, vertical and sense of rotation physiological parameter to nystagmus.
It is a kind of by real time record and analyze nystagmus in level, vertical and sense of rotation physiological parameter that the present invention also provides, thereby can effectively shorten the automatic generation method of the video frequency electronystagmograph of clinical detection time.
Technical scheme of the present invention is as follows:
Video frequency electronystagmograph instrument, comprise infrared video nystagmus image collecting device, the eye movement tracker, Computer Analysis disposal system and nystagmus monitor, described infrared video nystagmus image collecting device is connected in described eye movement tracker with vision signal, described eye movement tracker is electrically connected on described Computer Analysis disposal system, and described Computer Analysis disposal system is connected in described nystagmus monitor with vision signal.
Described infrared video nystagmus image collecting device is the infrared camera of band infrared light supply.
Described infrared camera is connected the employing wireless transmission method with the vision signal of described eye movement tracker.
Described eye movement tracker both had been provided with the rectangular coordinate system of the displacement composition that can directly extract eyeball level and vertical movement, was provided with again directly to extract the rotatablely move polar coordinate system of angular displacement composition of eyeball.
Described Computer Analysis disposal system is carried out nystagmus wave analysis handling procedure and is comprised the following steps: 1) to sampling from the nystagmus signal of eye movement tracker input; 2) moving window is searched for the flex point of described sampled signal; 3) judge whether described flex point is the peak dot or the valley point of nystagmus ripple, if the result then returns described step 2 for not); 4) judge the nystagmus direction; 5) calculate fast slow phase velocity; 6) storage or output electronystagmograph after the filtering.
A kind of automatic generation method of video frequency electronystagmograph comprises the following steps: (1) infrared camera collection video Electronystagmogram picture with the band infrared light supply; (2) adopt the eye movement tracker to extract the displacement composition of eyeball level and vertical movement, and the eyeball angular displacement composition that rotatablely moves, the nystagmus ripple drawn; (3) calculate nystagmus ripple basic parameter and nystagmus parameter clinical data in real time by the Computer Analysis disposal system; (4) output nystagmus parameter clinical data report.
Described nystagmus wave parameter clinical data in the described step (3) comprises latent period, nystagmus duration, nystagmus total degree, nystagmus frequency, nystagmus wave amplitude, nystagmus fast, slow phase velocity and anisopleual ratio.
Technique effect of the present invention is as follows:
Because video frequency electronystagmograph instrument of the present invention is organically combined infrared video nystagmus image collecting device, eye movement tracker, Computer Analysis disposal system and nystagmus monitor, it is the significant innovation of electronystagmograph recording technique, the signal of its collection changes the video image signal into by original electric signal, directly extract nystagmus ripple track, realized under bright-field or dark field condition, can both directly gathering image with the real-time monitored movements,nystagmic; For means have more intuitively been created in the assessment of clinical diagnosis and curative effect, electronystagmograph under the dark field condition is owing to got rid of the stimulation and the influence of visible light, diagnostic value is high, in conjunction with the observational record of the electronystagmograph under the bright-field condition with analyze contrast, can provide requisite important information for clinical disease diagnosis and curative effect assessment; The organic assembling of infrared video nystagmus image collecting device and eye movement tracker and Computer Analysis disposal system has been brought brand-new variation to the electronystagmograph record, the doctor no longer needs to paste skin electrode, having saved skin and electrode prepares, and the calibration of eyeball displacement parameter is accurate under the video image condition, easy to operate, standard value is not subjected to cornea, the influence of retina potential difference (PD), got rid of the baseline wander that the skin electrode polarized potential causes, the possible spinoff of also having avoided electrode contact skin to cause, nystagmus ripple by video image signal extraction does not have ground unrest in addition, wave mode is totally clear, its calculation of parameter more accurately and reliably, handle observation and analysis nystagmus phase of wave related parameter that can be real-time by computer digital image; Owing to also made up the nystagmus monitor, make the vision signal of drawing can be sent to the nystagmus monitor by the Computer Image Processing card, see in real time when conducting a survey and look into nystagmus, and under the dark field condition, also can see in real time and look into nystagmus for the clinician.This invention provides the detection scheme of a kind of brand-new, contactless, not damaged, no ground unrest and high definition image really for nystagmus record, processing ease and testing result are more reliable, overcome the defective of existing electronystagmograph technology fully, and means are looked in the real-time sight that provides new nystagmus to rotate nystagmus under composition observing function and the dark field condition simultaneously.
Because infrared video nystagmus image collecting device is the infrared camera of band infrared light supply, make video frequency electronystagmograph instrument of the present invention both can gather video nystagmus image continuously, in all directions, simple in structure again, easy for installation, infrared photography camera lens and infrared emission light source can be fixed on the special eyeshade frame, the eye movement video image directly absorbs in this system, provides guarantee for the clinician works safely and efficiently.
Because the vision signal connected mode with infrared camera and eye movement tracker in the technical scheme adopts wireless transmission method, make that use is more convenient, operate simpler, carry out detection of dynamic in particular for the nystagmus that occurs under human motion or the rotary state and brought facility, the trouble of having avoided transmission line to twine.
Because the eye movement tracker both had been provided with the rectangular coordinate system that can directly extract eyeball level and vertical movement displacement composition, be provided with again and can directly extract the rotatablely move polar coordinate system of angular displacement composition of eyeball, can see in real time and look into the eyes nystagmus, write down eyes level and vertical direction nystagmus wave mode simultaneously, can real time record and analyze nystagmus by the Computer Analysis disposal system in level, vertical and sense of rotation physiological parameter, manipulate simpler, time saving and energy saving, the clinical detection time can shorten half.
Because the Computer Analysis disposal system is provided with nystagmus wave analysis handling procedure, make the record, analysis of electronystagmograph and generation and the storage or the output of nystagmus parameter clinical data report, carrying out of standard automatically under the default program of science all, thereby detection is more objective, also more accurate, thus have more diagnostic value.
The automatic generation method of a kind of video frequency electronystagmograph of the present invention, can make and detect standard more, both help the summary and the popularization of experience, help the improvement of the system that detects and perfect again, shorten the clinical detection time greatly, can fully ensure the accuracy and the reliability that detect data simultaneously again.
In clinical practice, video frequency electronystagmograph instrument can be done following vestibular equilibrium function test:
1. SN (Spontaneous Nystagmus);
2. gaze test (Gaze Test);
3. pan test (Saccade Test);
4. steady tracking test (Pursuit Test);
5. OKN test (Optokinetic Test);
6. position test (Positional Test);
7. displacement test (Positioning Test);
8. temperature test (Caloric Test);
9. rotation test (Rotational Test);
10. look, vestibular interacts test (Visuo-Vestibular Interaction Test);
11. Coriolis acceleration test (Coriolis Test);
12. galvanism test (Galvanic Stimulation Test).
Description of drawings
Fig. 1 is a video frequency electronystagmograph instrument structured flowchart of the present invention;
Fig. 2 is a video frequency electronystagmograph instrument working state schematic representation of the present invention;
Fig. 3 is the basic parameter figure of nystagmus ripple;
Fig. 4 is an electronystagmograph analytical algorithm process flow diagram.
Mark lists as follows among the figure:
1-infrared video nystagmus image collecting device; 2-eye movement tracker;
2-Computer Analysis disposal system; 4-nystagmus monitor; The 5-infrared light supply;
The 6-infrared camera.
SA-slow phase amplitude; The ST-slow phase time; The SV-slow phase velocity; The fast phase amplitude of FA-;
The fast phase time of FT-; The fast phase velocity of FV-; The a-flex point; The b-flex point; The c-flex point.
101-is to sampling from the nystagmus signal of eye movement tracker input;
The 102-moving window is searched for the flex point of described sampled signal;
103-judges whether described flex point is the peak dot or the valley point of nystagmus ripple;
104-judges the nystagmus direction; 105-calculates fast slow phase velocity;
Storage or output electronystagmograph after the 106-filtering.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
As shown in Figure 1, video frequency electronystagmograph instrument of the present invention, comprise infrared video nystagmus image collecting device 1, eye movement tracker 2, Computer Analysis disposal system 3 and nystagmus monitor 4, its annexation and signal transmission form are: described infrared video nystagmus image collecting device 1 is connected in described eye movement tracker 2 with vision signal, described eye movement tracker 2 is electrically connected on described Computer Analysis disposal system 3, and described Computer Analysis disposal system 3 is connected in described nystagmus monitor 4 with vision signal.Fig. 2 shows the situation that infrared video nystagmus image collecting device 1 is made up of the infrared camera 6 of band infrared light supply 5.
Principle of work of the present invention and process are as follows: the first step, and infrared photography camera lens 6 and infrared emission light source 5 are fixed on the special eyeshade frame, and the eye movement video image directly absorbs in this system, sees Fig. 2; In second step, the video image signal is discerned processing by eye movement tracker 2, extracts oculomotor level, vertical and rotation composition, obtains the nystagmus ripple; In the 3rd step, the nystagmus ripple is calculated in real time by Computer Analysis disposal system 3, and basic parameter and nystagmus wave analysis algorithm flow are seen Fig. 3 and Fig. 4; The 4th step, computing machine generates nystagmus parameter clinical report automatically, comprise latent period, nystagmus duration, nystagmus total degree, nystagmus frequency, nystagmus wave amplitude, nystagmus slow phase velocity and anisopleual ratio: the 5th step, send nystagmus monitor 4 by the vision signal that the Computer Image Processing card is drawn, do to see in real time when checking for the clinician and look into nystagmus.
Basic parameter shown in Figure 3 comprises: slow phase amplitude SA; Slow phase time ST; Slow phase velocity SV; Fast phase amplitude FA; Fast phase time FT; Fast phase velocity FV; Flex point a; Flex point b; Flex point c.As shown in Figure 3, slow phase velocity SV is the slope of slow phase section ab; Fast phase velocity FV is the slope of fast phase section bc.
Nystagmus wave analysis algorithm flow as shown in Figure 4, step 101 is for sampling to the nystagmus signal from eye movement tracker input.In step 101, the Computer Analysis disposal system is in the real-time transmission state that is connected with the infrared camera of eye movement tracker and band infrared light supply, by the eye movement video image acquisition nystagmus ripple signal of direct picked-up; The eye movement tracker, the model of producing as American I SCAN company is the eye movement tracker equipment of RK-426, can from oculomotor video image, discern the scope of pupil and the position of central point and the movement locus of real-time follow-up central point automatically.Step 102 is the flex point of moving window search sampled signal, i.e. flex point a among the nystagmus ripple basic parameter figure, flex point b, flex point c.Step 103 is for to judge whether described flex point is the peak dot or the valley point of nystagmus ripple, if the result then returns described step 102 for not.Step 104 is for judging the nystagmus direction.Step 105 is for calculating fast slow phase velocity.Step 106 is storage after the filtering or output electronystagmograph.
The above only is a preferred implementation of the present invention.Should be pointed out that for a person skilled in the art,, can also make some modification and improvement, and the technical program is in the application in other similar fields, but these all fall into protection scope of the present invention based on the same principle of invention of the present invention.
Claims (6)
1. video frequency electronystagmograph instrument, comprise infrared video nystagmus image collecting device, the eye movement tracker, Computer Analysis disposal system and nystagmus monitor, described infrared video nystagmus image collecting device is connected in described eye movement tracker with vision signal, described eye movement tracker is electrically connected on described Computer Analysis disposal system, and described Computer Analysis disposal system is connected in described nystagmus monitor with vision signal; Described eye movement tracker both had been provided with the rectangular coordinate system of the displacement composition that can directly extract eyeball level and vertical movement, was provided with again directly to extract the rotatablely move polar coordinate system of angular displacement composition of eyeball.
2. video frequency electronystagmograph instrument according to claim 1 is characterized in that: described infrared video nystagmus image collecting device is the infrared camera of band infrared light supply.
3. video frequency electronystagmograph instrument according to claim 2 is characterized in that: described infrared camera is connected the employing wireless transmission method with the vision signal of described eye movement tracker.
4. the automatic generation method of a video frequency electronystagmograph comprises the following steps: (1) infrared camera collection video Electronystagmogram picture with the band infrared light supply; (2) adopt the eye movement tracker, this eye movement tracker both had been provided with the rectangular coordinate system of the displacement composition that can directly extract eyeball level and vertical movement, be provided with again and can directly extract the rotatablely move polar coordinate system of angular displacement composition of eyeball, extract the displacement composition of eyeball level and vertical movement, and the eyeball angular displacement composition that rotatablely moves, draw the nystagmus ripple; (3) calculate nystagmus ripple basic parameter and nystagmus parameter clinical data in real time by the Computer Analysis disposal system; (4) output nystagmus parameter clinical data report.
5. the automatic generation method of a kind of video frequency electronystagmograph according to claim 4 is characterized in that: the described nystagmus wave parameter clinical data in the described step (3) comprises latent period, nystagmus duration, nystagmus total degree, nystagmus frequency, nystagmus wave amplitude, nystagmus fast, slow phase velocity and anisopleual ratio.
6. the automatic generation method of a kind of video frequency electronystagmograph according to claim 4 is characterized in that: described Computer Analysis disposal system is carried out nystagmus wave analysis handling procedure and is comprised the following steps: 1) to sampling from the nystagmus signal of eye movement tracker input; 2) moving window is searched for the flex point of described sampled signal; 3) judge whether described flex point is the peak dot or the valley point of nystagmus ripple, if the result then returns described step 2 for not); 4) judge the nystagmus direction; 5) calculate fast slow phase velocity; 6) storage or output electronystagmograph after the filtering.
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| CN103919557B (en) * | 2014-04-17 | 2015-12-30 | 大连理工大学 | Be applied to nystagmus parameter attribute acquisition methods and the device of diagnosis of benign paroxysmal positional vertigo |
| CN105095840B (en) * | 2014-05-22 | 2019-05-07 | 兰州大学 | Multi-direction upper nystagmus method for extracting signal based on nystagmus image |
| CN109864699A (en) * | 2019-01-04 | 2019-06-11 | 东南大学 | Animal nystagmus parameter based on vestibulo-ocular reflex obtains system and method |
| CN110148110B (en) * | 2019-04-01 | 2023-03-24 | 南京慧视医疗科技有限公司 | Spontaneous intelligent diagnosis system for eye shake |
| CN114617529B (en) * | 2022-05-12 | 2022-08-26 | 上海志听医疗科技有限公司 | Eyeball dizziness data identification method and system for eye shade equipment |
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